Casting mold for aluminothermic rail welding



Sept. 23, 1930.

CASTING MOLD FOR ALUMINOTHERMIC RAIL WELDING INVENTOR p BY L a Hi5ATTORNEY Patented Sept. 23, 1930 HERMANN SCHULTZ, OF BERLIN-LANKWITZ,GERMANY I CASTING MOLD F OB ALUMINOTHERMIG RAIL WELDING Applicationfiled July 2, 1929, Serial No. 375,491, and in Germany July 4, 19 28.

The present invention relates to certain improvements in molds foraluminothermic railwelding, which involve enclosing the ends of therails to be welded in a mold, preheating the railends and the mold bymeans of a gas flame or other; medium and pouring superheated metal intothe mold to effect a welded joint or union between the sections. Inaluminothermlc railwelding 1t 1s essen 1o 'tial that the rails to bewelded and the mold or kl) surrounding the rail ends are uniformlypreheated.

To this end the invention comprises the construction of a mold having anespecially eflicient arrangement of the heating gate and an outlet forthe hot gases on the same side of the rails.

The heating gate is directed towards the web of the rails and the outletfor the burned gases is arranged level with the base 'of the rails. Thepouring gate serves also asan outlet for the burned gases. If necessaryother outlets can be provided.

- The invention is illustrated in the accompanying drawing which is avertical sectional elevation. A is a rail to be welded, B is the moldenclosing the rail A. C is the pouring gate D is the heating gate and Eis an outlet for burned gases.

This arrangement of the inlet D and-the I outlet E, in cOn unction withthe pouring gate C and the lateral openings in the upper part of themold between the side walls of the latter and the side faces of the railheads, provides four outlets which induce a substam tially equaldistribution of the heating medium over and against the surfaces of therail ends and also the inner walls of the mold cavity, thereby effectinga substantially uni-.

medium is distributed form heatin ends.

impinging the webs of the rails at or about the mid height is deflectedin part laterally in of all parts of the enclosed rail In ot er words,the heating medium both directions and in part passes through the usualgap between the rail ends, the latter by the walls of the mold againstthe opposing surfaces of the rail ends, so that said in substantiallyequal proportions from the central pointof enportions of saidproductsbeing deflected fects on all parts of the rail heating medium escapes atends before said the four outlets referred to namely, the outlet duct E,the pouring gate C and the two openings formed between the side f theadjacent walls What I claim is aces of the rail heads and of the mold.

1. Ara-sting mold for aluminothermic rail- Welding having a wards theweb of' an outlet for burn of the rails.

2. Casting mold for welding heating gate directed to the rails andhavingalso ed gases on the same side aluminothermic railhaving a heatinggate directed towards the webiof the rails and having also an outlet forburned gases on the sameside of therails 3. A mold for operations havinglevel with the base of the rails.

alumino-thermic welding an inlet duct for the preheating mediumextending from one side ofthe mold mid height of the into the moldcavity at or about the parts to be welded and an outlet or exhaust ductfor the heating medium located in the same tending from near the moldsection and exbottom of the mold cavity to the lateral face of themold.-

In testimony wh ereof I aifix my signature.

BMANN SCHULTZ.

